Means for removing water of condensation from drying-cylinders.



0. w. DODGE. v MEANS FOR REMOVING W'ATER 0F CONDENSA-TION FROM DRYINGCYLINDERS.

APPLICATION FILED MAY 24. l9l3- RENEWED JULY 11, I9l6.

Patented Feb. 6,1917.

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0. w. DODGE. MEANS FOR R EMOYING WATER 0F CONDENSATION FROM DRYINGCYLINDERS APPLICATION FILED MAY 24. 1913. RENEWED JULY II. 1916. 1 ,215,25 8-. Patented Feb. 1917.

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OTIS WM. DODGE, OF SPOKANE, WASHINGTON, ASSIGNOR'DF vONE-I-JLAIJETOWALTER H. BOWES COMPANY, OF PORT CHESTER, NEW YORK, A- CORPORATION OFNEW YORK.

MEANS FOR REMOVING WATER 0F CONDENSATION FROM DRYING-OYEINDERS.

' Patented Feb. 6, 1917.

Application filed 101215724, 1913, Serial No. 769,762. Renewed July 11,1916. Serial 'No."1 08,724.

To all whom it may concern Be it known that I, OTIS W. DODGE, ofSpokane, in the county of Spokane and State of Washington, have inventedcertain new and useful Improvements in Means for Removing Water ofCondensation from Drying-Cylinders; and I hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form part of thisspecification.

This invention is a novel improvement-in means for removing water ofcondensation from steam heated cylinders, and is particularly designedfor use in connection with I the drying cylinders of paper makingmachines; and its object is to enable all water of condensation to beremoved from the cylinders so that the interior surfaces of thecylinders can be kept dry, thereby facilitating the heating thereof andenabling each cylinder to be kept at a uniform temperature throughoutits entire peripheral surface; and also enablingsuch cyllnders to be runat much greater peripheral speeds than has heretofore been practicable,owing to the fact that at above a, certain speed water of condensationwill adhere to the inner wall of the cylinder and rotate with thecylinders by centrifugal force; and coat the interior of the cylinderswith a film of water thereby impairing their efficiency andnecessitating the useof a great amount of steam for heating them to theproper temperature.

With my invention all the water of condensation is removed as fast as itis precipitated and the invention acts most 'efficiently when thecylinder is rotated at high speed. I

The accompanying drawings illustrate an apparatus, applicable to dryingcylinders of the character referred to, embodying one practical form ofmy invention; andanel:- planation of the construction and made. ofoperation of suchapparatus will impart a clear understanding of theinvention and enable those familiar with the art to readily utilize thesame in connectionwith various kinds and sizes of drying, or steamheated, cylinders.

In the drawings 1 F'gure 1 represents a longitudinal section through asteam heated cylinder equipped with my improved novel apparatus forremoving water of condensation therefrom.

Fig. 2 is a detail top plan view of the water trap. v

Fig. 3 is an enlarged vertical transverse section on line 33, Figgl.

Fig. 4 is anenlarged transverse section on l1ne 4.-4, Fig. 2. v

Figs. 5 and 6 are detail-views of the ad ustable bearing 01'' supportfor the trap.

The cylinder may be of any desired construction; as shown it is composedof a cylindric shell land heads 1 ,'-1 -closely fitted thereto andclosing theends-thereof; each head may be provided with a hollowtrunnion. The trunnion 1 of the head 1 is journaled in a support v, F ofany suitable kind and extends through such bearing, and its outer end isconnected by a steam tight fitting or joint 2, ofordinary construction,with a hollow collar 2*, which in turn is connected by a pipe 2 with asteam supply, of any suitable kind.

The trunnion 1 'off the head l is journaled in a bearing 3 hereinafterreferred to, whlch 1s mountedoon a support F of any suitableconstruction.

Throughthe collar 2 steam fitting 2, and trunnion 1 extends a drain pipeA which supports the water trap in the cylinder and dlscharges watertherefrom as hereinafter explained. The collar 2 has a packing or gland2 I at its outer end forming a steam tight joint around the pipe 4 sothat steam cannot escape from the cylinder around the pipe 4:. I prefertoattach a shaft 4 to the inner end of pipe 4 and this shaft 4 extendsthrough the trunnion 1 of head 1, and is supported in a casting 3 whichis supported on the bearing 3 and may be secured by a nutl3 screwed onthe outer end of the shaft 4*, a bearing plate 3 is placed around thepipe and between the cap andany suitable devices may be used to make asteam tight joint between the shaft 4? and the trunnion 1 The castlng 3may be adj ustably supported on bearing 3 by means of bolts ,3 tappedthrough a flange 3 on the end of the bearing 3 as shown, andthus raiseandlower the bearing so as to enable the adjacent end of the shaft P tobe adjusted lateral-1y in the trunnion 1 The shaft 4 is preferablysupported on the bearing 3 and the relative positions of the shaft 4?and the trunnion 1 will not be disturbed by the adjustment of thebearing 3.

As shown in the drawings a bar 3 extends .ported at its rear edge by anangle bar across the end of the shaft and casting 3 and is adjustablysecured by bolts 8 to the bearing 3. Springs 3 being strung on the boltsbetween the nuts and bearing so as to hold the plate yieldinglythereagainst. This construction would take up any end thrust or play ofthe cylinder relative to the shaft 4 and assists in keeping the trap,hereinafter referred to, properly positioned longi tudina-lly of thecylinder.

The shaft/1; may be keyed or pinned to the casting 3 so that it cannotturn relatively thereto, and the casting 3 may have a vertical slidingfit in the flange as indicated in Fig. 5 so that it cannot rotate. Theinvention is not restricted to the particular means shown for supportingthe shaft 3 in the bearing 3; nor to the means shown for producing atight joint between the shaft and trunnion 1 nor to the means forpreventing relative endwise movement of the cylinder and shaft.

The end of the pipe 4 extending through the collar 2 may be supported ona stud F and it is connected by an elbow 4 to a drain 4 through whichany water in pipe 4 escapes in the usual manner.

Within the cylinder 1 and extending longitudinally thereof andpreferably located at a point about 45 above the axis of the cylinder,is a water trap; which as shown preferably consists of a troughshapedmember 5 extending longitudinally,

and preferably extending the entire length of the cylinder between theheads 1, 1 This trough is preferably tapered, one end being larger thanthe other, so that its bottom is inclined as shown in Fig. 1, and waterentering such trough will drain from the small toward the large endthereof; and

its large end is connected by a pipe 5 with the pipe 4 so that any watercaught in this trap will be directed into the pipe 4 and then dischargedthrough the pipe 4. This trap may be made of sheet metal, and sup 5 andthis angle'bar may be supported by radial arms 5 detachably attached tothe pipe 4 and shaft '4 in any suitable manner.

To the outer edge of the rear side of the trap 5 I attach a brush 6,which may be of anysuitable material; preferably brass; and the brush 6may be conveniently formed of thin brass plates, or of brass wiresclamped between the bar 5 and a plate 6 attached thereto by screws 6 asindicated in Figs. 3 and 4.

The trap is positioned in thecylinder, preferably as shown in Figs. 1and 4, above the axis of the cylinder and at the ascending side thereofthe cylinder turning toward the brush the brush is so located that itwill sweep the entire inner periphery of the cyllnder as the latterrevolves, and any water adhering to the walls of the cylinder would beswept off by the brush and directed into the trap 5, and would beconducted thereby to the outlet pipe 4 and discharged through the pipe 4With this means the higher the speed of the cylinder the more efficientis the brush; and it is impossible for any water of condensation tocollect and remain upon the interior wall of the cylinder when'thelatter is properly equipped with a device embodying my invention.

it high speeds water naturally tends to adhere to the wall of thecylinder under the influence of centrifugal force, and the ordinaryscoopingapparatuswill not remove all the water of condensation; nor willscoops rotating with the cylinder remove all the water of condensationwhen the cylinder is rotated at very high speed; but with my device thefaster the cylinder rotates the quicker will the water of condensationbe removed. This invention can be applied to steam heated cylinders ofall kinds, and to those now used in paperdrying machines; and willenable the practical working speed of such cylinders to be greatlyincreased thereby effecting a corresponding increase in efficiency ofthe machine byenlarging its output and decreasing the cost ofproduction; and also, because of the superior action of my invention inkeeping the interior of the cylinder perfectly dry; such cylinder can beheated more uniformly and more eflioiently and with less steam pressurethan heretofore required, thereby further economizing and lessening thecost of production of the paper.

It will be seen that steam can be freely admitted into the cylinder toheat same; some of the steam will be condensed by contact with the wallsof the cylinder; particuilarly where such wall contacts with a cool wetweb, or material being dried. V'Vhen the cylinder is rotating at highspeed this water of condensation will adhere to the inner wall of thecylinder, and as the cylinder rotates, in the direction indicated by thearrow in the drawings, the water of condensation will be carried up onthe wall of the cylinder until it meets'brush 6 by which it will beswept off the wall and it will descend by gravity into the trap 5 andthen will pass by gravity to the pipe 4 and on outthrough the discharge4?,

The brush is so constructed that the trap may be adjusted to any desiredangle with in the cylinder and the pipe 4 and shaft 4 may be adjustedradially in the cylinder to insure proper contact between thebrush andthe inner wall of the cylinder.

What I claim is: g V v "1. Apparatus for removing water of condensationfrom rotary steam heated drying cylinders comprising relativelystationary means within the cylinder for brushing wation from the innersurface of the cylinder,

and means for discharging the water from the cylinder.

3. In combination with a rotary steam heated drying cylinder, relativelyfixed means extending longitudinally of the cylinder and located abovethe axis thereoffor brushing water of condensation from the innersurface of the cylinder, and means for discharging the water.

4. In combination with a rotary steam heated drying cylinder, relativelyfixed means for removing water of condensation therefrom, comprisingdevices Within the cylinder for brushing water from the wall thereof asthe cylinder rotates, and devices for discharging such water from thecylinder.

5. In combination with a rotatable steam heated cylinder, relativelystationary means extending longitudinally of and within the cylinder andlocated above the axis thereof adapted to brush water of condensationfrom the inner surface of the cylinder as the latter rotates, and meansfor discharging the water.

6. In combination with a rotary steam heated drying cylinder, arelatively stationary trap in the cylinder, a brush adapted to sweepwater of condensation from the surface of the cylinder into such trap,and means for discharging water from the trap out of the cylinder.

7. In combination with a rotary steam heated drying cylinder, arelatively fixed trap in the cylinder located above the axis thereof, abrush adapted to sweep water of and means for discharging water from thetrap out of the cylinder. 7

8. In combination with a rotatable steam heated drying cylinder,relatively fixed means therein located above the axis thereof andadapted to sweep water of condensation from the surface of the cylinderas it rotates, and means for discharging such water from the cylinder.

9. In combination a rotatable drying cylinder, a trap within andextending longitudinally of the cylinder and located above the axisthereof, a brush attached to the rear wall of said trap and adapted tobrush water from the wall of the cylinder into said trap, and means fordischarging water from the trap.

10. In combination a rotatable drying cylinder, and a trap within andextending 1on gitudinally of the cylinder; with a brush attached to thesaid trap adapted to brush water from the wall of the cylinder into saidtrap, means for discharging water from the trap; and means for adjustingthe trap in the cylinder.

11. In combination a rotatable drying cylinder, a trap within andextending longitudinally of the cylinder and located above the axisthereof, a brush attached to the rear wall of said trap and adapted tobrush water from the wall of the cylinder into said trap; means fordischarging water from the trap; and means for adjusting the trap in-thecylinder.

In testimony that I claim the foregoing as my own, I affix my signaturein presence of two witnesses.

OTIS WM. DODGE. Witnesses:

DONALD U. RIoK, L. E. WITHAM.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

